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Center for Astrophysics A Hubble image of the M-dwarf star Proxima Centauri, our closest stellar neighbor about four light-years away. Proxima hosts two planets, and is known to actively flare. Astronomers studying the suitability for life evolving on exoplanets around M-dwarf stars have completed a multi-wavelength analysis of an extreme flare on Proxima Cen. Hubble/ ESA/NAS The prospects for life around low-mass, cool M-type stars have been extensively discussed because these stars are the most common ones in the galaxy, and they frequently host Earth-sized planets in their habitable zones (orbits where the surface temperatures can support liquid water). Unfortunately for the prospects of life, however, these stars also exhibit higher levels of stellar activity and flaring than do more massive, solar-type stars, and flares can gradually deplete a planet’s atmosphere of molecules needed for life. Moreover, these hostile conditions persist in some fashion throughout ....
E-Mail IMAGE: Artist s conception of the violent stellar flare from Proxima Centauri discovered by scientists in 2019 using nine telescopes across the electromagnetic spectrum, including the Atacama Large Millimeter/submillimeter Array (ALMA). Powerful. view more Credit: NRAO/S. Dagnello Scientists have spotted the largest flare ever recorded from the sun s nearest neighbor, the star Proxima Centauri. The research, which appears today in The Astrophysical Journal Letters, was led by the University of Colorado Boulder and could help to shape the hunt for life beyond Earth s solar system. CU Boulder astrophysicist Meredith MacGregor explained that Proxima Centauri is a small but mighty star. It sits just four light-years or more than 20 trillion miles from our own sun and hosts at least two planets, one of which may look something like Earth. It s also a red dwarf, the name for a class of stars that are unusually petite and dim. ....
University of Colorado Boulder Artist’s conception of a violent flare erupting from the star Proxima Centauri. (Credit: NRAO/S. Dagnello) Scientists have spotted the largest flare ever recorded from the sun’s nearest neighbor, the star Proxima Centauri. The research, which appears today in The Astrophysical Journal Letters, was led by CU Boulder and could help to shape the hunt for life beyond Earth’s solar system. CU Boulder astrophysicist Meredith MacGregor explained that Proxima Centauri is a small but mighty star. It sits just four light-years or more than 20 trillion miles from our own sun and hosts at least two planets, one of which may look something like Earth. It’s also a “red dwarf,” the name for a class of stars that are unusually petite and dim. ....